ES2139840T3 - PROCEDURE FOR THE MANUFACTURE OF A STEEL THAT CONTAINS CHROME AND PRESENTS A LOW CARBON CONTENT. - Google Patents
PROCEDURE FOR THE MANUFACTURE OF A STEEL THAT CONTAINS CHROME AND PRESENTS A LOW CARBON CONTENT.Info
- Publication number
- ES2139840T3 ES2139840T3 ES95303347T ES95303347T ES2139840T3 ES 2139840 T3 ES2139840 T3 ES 2139840T3 ES 95303347 T ES95303347 T ES 95303347T ES 95303347 T ES95303347 T ES 95303347T ES 2139840 T3 ES2139840 T3 ES 2139840T3
- Authority
- ES
- Spain
- Prior art keywords
- gas
- tuning
- oven
- steel
- reduced pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 238000000034 method Methods 0.000 title abstract 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title 1
- 229910052799 carbon Inorganic materials 0.000 title 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 2
- 229910001882 dioxygen Inorganic materials 0.000 abstract 2
- 239000001301 oxygen Substances 0.000 abstract 2
- 229910052760 oxygen Inorganic materials 0.000 abstract 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 239000011819 refractory material Substances 0.000 abstract 1
- 229910001220 stainless steel Inorganic materials 0.000 abstract 1
- 239000010935 stainless steel Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/30—Regulating or controlling the blowing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/068—Decarburising
- C21C7/0685—Decarburising of stainless steel
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
EN LA PRODUCCION DE ACERO INOXIDABLE SE INTENTA REDUCIR LA MAYOR TEMPERATURA ALCANZADA DURANTE EL AFINADO DEL ACERO FUNDIDO AL TIEMPO QUE SE MANTIENE LA TEMPERATURA DE COLADA PARA ASI PROLONGAR LA VIDA DE LOS MATERIALES REFRACTARIOS DEL HORNO DE AFINADO. TRAS LLEVAR A CABO UN TRATAMIENTO DE DESCARBURACION A PRESION ATMOSFERICA EN EL HORNO DE AFINADO A BASE DE INYECTAR UN GAS QUE CONTENGA OXIGENO EN EL ACERO FUNDIDO, SE SIGUE LLEVANDO A CABO UNA DESCARBURACION DEL ACERO FUNDIDO Y UNA REDUCCION DE LOS OXIDOS DE CROMO BAJO AGITACION A BASE DE INYECTAR UN GAS NO OXIDANTE A PRESION REDUCIDA Y, A CONTINUACION, SE CARGA UN AGENTE REDUCTOR EN EL HORNO PARA REDUCIR LOS OXIDOS DE CROMO MANTENIENDO LA PRESION REDUCIDA. CON LA OPERACION A PRESION ATMOSFERICA ANTEDICHA LA CANTIDAD TOTAL DE GAS DE OXIGENO ES MENOR QUE EN UN PROCESO CONVENCIONAL, MIENTRAS QUE EN LA ETAPA FINAL DE LA OPERACION A PRESION REDUCIDA SE VUELVE A INYECTAR UN GAS QUE CONTENGA OXIGENO EN UNA CANTIDAD EQUIVALENTE AL EQUILIBRIO DE LA CANTIDAD DE GAS DE OXIGENO NORMALMENTE INYECTADA EN LA OPERACION A PRESION ATMOSFERICA ANTEDICHA PARA ASI PROVOCAR UNA GENERACION DE CALOR MEDIANTE UNA REACCION POR OXIDACION DEL CROMO AUMENTANDO ASI LA TEMPERATURA DEL ACERO FUNDIDO A UNA TEMPERATURA NECESARIA TENIENDO EN CUENTA EL SUBSIGUIENTE DESCENSO DE LA TEMPERATURA.IN THE PRODUCTION OF STAINLESS STEEL, EFFECTS ARE MADE TO REDUCE THE HIGHEST TEMPERATURE ACHIEVED DURING THE TUNING OF CAST STEEL AT THE TIME THAT THE CAST TEMPERATURE IS MAINTAINED TO PROLONG THE LIFE OF THE REFRACTORY MATERIALS OF THE TUNING OVEN. AFTER CARRYING OUT A TREATMENT OF ATMOSPHERIC PRESSURE DECARBURATION IN THE TUNING OVEN BASED ON INJECTING A GAS THAT CONTAINS OXYGEN IN CAST STEEL, CONTINUING TO CARRY OUT A DECARBURATION OF CAST STEEL AND A REDUCTION OF OXIDIZED OXIDE BASED ON INJECTING A NON-OXIDIZING GAS AT REDUCED PRESSURE AND THEN A REDUCING AGENT IS CHARGED IN THE OVEN TO REDUCE CHROME OXIDES BY MAINTAINING REDUCED PRESSURE. WITH THE ABOVE ATMOSPHERIC PRESSURE OPERATION THE TOTAL AMOUNT OF OXYGEN GAS IS LESS THAN IN A CONVENTIONAL PROCESS, WHILE IN THE FINAL STAGE OF THE OPERATION WITH REDUCED PRESSURE A GAS CONTAINING OXYGEN EQUIVALENTLY IS RE-INJECTED IN A EQUIVALENT QUANTITY THE NUMBER OF OXYGEN GAS NORMALLY INJECTED IN THE ABOVE ATMOSPHERIC PRESSURE OPERATION IN ORDER TO CAUSE A GENERATION OF HEAT THROUGH A REACTION BY OXIDATION OF CHROME, SO INCREASING THE TEMPERATURE OF THE SUNNY WATER TEMP.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16261694A JP3531218B2 (en) | 1994-06-20 | 1994-06-20 | Method for producing low carbon chromium-containing steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES2139840T3 true ES2139840T3 (en) | 2000-02-16 |
Family
ID=15757995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES95303347T Expired - Lifetime ES2139840T3 (en) | 1994-06-20 | 1995-05-18 | PROCEDURE FOR THE MANUFACTURE OF A STEEL THAT CONTAINS CHROME AND PRESENTS A LOW CARBON CONTENT. |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5547489A (en) |
| EP (1) | EP0688877B1 (en) |
| JP (1) | JP3531218B2 (en) |
| KR (1) | KR100396029B1 (en) |
| DE (1) | DE69512967T2 (en) |
| ES (1) | ES2139840T3 (en) |
| TW (1) | TW346505B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19621143A1 (en) * | 1996-01-31 | 1997-08-07 | Mannesmann Ag | Process for the production of stainless steels |
| EP1403387A4 (en) * | 2001-07-02 | 2008-07-02 | Nippon Steel Corp | METHOD FOR REFRINTING DECORBURATION OF MOLTEN STEEL CONTAINING CHROME |
| KR100662895B1 (en) * | 2001-09-20 | 2007-01-02 | 신닛뽄세이테쯔 카부시키카이샤 | Refining method and refining apparatus for chrome melt |
| CN102041351B (en) * | 2010-11-07 | 2012-10-03 | 山西太钢不锈钢股份有限公司 | Slag conditioning method for refining chromium-nickel austenite stainless steel with argon-oxygen furnace |
| JP5583042B2 (en) | 2011-02-04 | 2014-09-03 | 株式会社デンソー | Electronic control unit |
| DE102013014856A1 (en) * | 2013-04-15 | 2014-10-16 | Sms Siemag Ag | Process and plant for the production of low carbon ferroalloys in a vacuum converter |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4174212A (en) * | 1978-03-10 | 1979-11-13 | A. Finkl & Sons Co. | Method for the refining of steel |
| JPH01294818A (en) * | 1988-05-23 | 1989-11-28 | Nkk Corp | Method for vacuum-treating stainless steel |
| JP2850407B2 (en) * | 1989-04-18 | 1999-01-27 | 大同特殊鋼株式会社 | Refining method of chromium-containing molten steel |
| JPH03257115A (en) * | 1990-03-07 | 1991-11-15 | Kawasaki Steel Corp | Decarburization refining method for molten stainless steel |
| JP2850546B2 (en) * | 1991-02-06 | 1999-01-27 | 大同特殊鋼株式会社 | Refining method of high chrome steel |
| US5304231A (en) * | 1991-12-24 | 1994-04-19 | Kawasaki Steel Corporation | Method of refining of high purity steel |
| SE9203556L (en) * | 1992-11-26 | 1993-10-25 | Aga Ab | Ways to make stainless steel by treating with oxygen and inert gas |
| DE4328045C2 (en) * | 1993-08-20 | 2001-02-08 | Ald Vacuum Techn Ag | Process for decarburizing carbon-containing metal melts |
| KR101398444B1 (en) | 2013-11-06 | 2014-05-27 | 주식회사 코베아 | Valve |
-
1994
- 1994-06-20 JP JP16261694A patent/JP3531218B2/en not_active Expired - Lifetime
-
1995
- 1995-03-23 TW TW084102822A patent/TW346505B/en not_active IP Right Cessation
- 1995-05-18 EP EP95303347A patent/EP0688877B1/en not_active Expired - Lifetime
- 1995-05-18 DE DE69512967T patent/DE69512967T2/en not_active Expired - Fee Related
- 1995-05-18 ES ES95303347T patent/ES2139840T3/en not_active Expired - Lifetime
- 1995-05-22 US US08/445,947 patent/US5547489A/en not_active Expired - Lifetime
- 1995-06-09 KR KR1019950015457A patent/KR100396029B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US5547489A (en) | 1996-08-20 |
| JP3531218B2 (en) | 2004-05-24 |
| JPH083615A (en) | 1996-01-09 |
| EP0688877B1 (en) | 1999-10-27 |
| TW346505B (en) | 1998-12-01 |
| DE69512967T2 (en) | 2000-04-06 |
| DE69512967D1 (en) | 1999-12-02 |
| KR100396029B1 (en) | 2004-01-07 |
| KR960001140A (en) | 1996-01-25 |
| EP0688877A1 (en) | 1995-12-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG2A | Definitive protection |
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